TY  - BOOK
AU  - Strahler Arthur N
AU  -  Strahler Alan H
TI  - Geography and man's environment
SN  - 0471018708
U1  - U47, L7 
PY  - 1977///
CY  - New York
PB  - Wiley U S A      
KW  - Human Geography
N1  - Bib p. 493-509
ER  -